Lens module

ABSTRACT

A lens module includes a first lens having refractive power, a second lens having refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having refractive power and having a concave object-side surface and a concave image-side surface, and a sixth lens having refractive power and a concave image-side surface. The first to sixth lenses are sequentially disposed from an object side to an image side.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.14/663,970 filed on Mar. 20, 2015, which issued as U.S. Pat. No.10,073,245 on Sep. 11, 2018, which claims the benefit under 35 USC119(a) of Korean Patent Application No. 10-2014-0149640 filed on Oct.30, 2014, in the Korean Intellectual Property Office, the entiredisclosures of which are incorporated herein by reference for allpurposes.

BACKGROUND

Some embodiments of the present disclosure may relate to a lens modulehaving an optical system including six or more lenses.

Lens modules, mounted in camera devices provided in portable terminals,commonly include a plurality of lenses. For example, such a lens modulemay include six lenses, in order to provide an optical system havinghigh resolution.

However, in the case that such an optical system having high resolutionis configured using a plurality of lenses, as described above, a focallength (the distance from an object-side surface of a first lens to animage-sensing surface) of the optical system may be increased. In thiscase, it may be difficult to mount the lens module in a relatively thindevice or portable terminal. Therefore, the development of a lens modulein which a length of the optical system is reduced may be needed.

Patent Documents 1 to 3 listed below relate to art associated with thelens module.

RELATED ART DOCUMENT

(Patent Document 1) U.S. Patent Application Publication No. 2012/0243108

(Patent Document 2) U.S. Patent Application Publication No. 2014/0111876

(Patent Document 3) U.S. Patent Application Publication No. 2014/0192422

SUMMARY

Some exemplary embodiments in the present disclosure may provide a lensmodule having high resolution.

According to an aspect of the present disclosure, a lens module mayinclude six lenses including a fifth lens having refractive power and aconcave object-side surface and a concave image-side surface and a sixthlens having refractive power and a concave image-side surface.

Other embodiments are also described. The above summary does not includean exhaustive list of all aspects of the present invention. It iscontemplated that the invention includes all lens modules that can bepracticed from all suitable combinations of the various aspectssummarized above, as well as those disclosed in the Detailed Descriptionbelow and particularly pointed out in the claims filed with theapplication. Such combinations have particular advantages notspecifically recited in the above summary.

BRIEF DESCRIPTION OF DRAWINGS

The above and other aspects, features and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a configuration diagram of a lens module according to a firstexemplary embodiment of the present disclosure;

FIG. 2 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 1;

FIG. 3 is a table illustrating characteristics of lenses illustrated inFIG. 1;

FIG. 4 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 1;

FIG. 5 is a configuration diagram of a lens module according to a secondexemplary embodiment of the present disclosure;

FIG. 6 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 5;

FIG. 7 is a table illustrating characteristics of lenses illustrated inFIG. 5;

FIG. 8 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 5;

FIG. 9 is a configuration diagram of a lens module according to a thirdexemplary embodiment of the present disclosure;

FIG. 10 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 9;

FIG. 11 is a table illustrating characteristics of lenses illustrated inFIG. 9;

FIG. 12 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 9;

FIG. 13 is a configuration diagram of a lens module according to afourth exemplary embodiment of the present disclosure;

FIG. 14 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 13;

FIG. 15 is a table illustrating characteristics of lenses illustrated inFIG. 13;

FIG. 16 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 13;

FIG. 17 is a configuration diagram of a lens module according to a fifthexemplary embodiment of the present disclosure;

FIG. 18 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 17;

FIG. 19 is a table illustrating characteristics of lenses illustrated inFIG. 17;

FIG. 20 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 17;

FIG. 21 is a configuration diagram of a lens module according to a sixthexemplary embodiment of the present disclosure;

FIG. 22 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 21;

FIG. 23 is a table illustrating characteristics of lenses illustrated inFIG. 21;

FIG. 24 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 21;

FIG. 25 is a configuration diagram of a lens module according to aseventh exemplary embodiment of the present disclosure;

FIG. 26 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 25;

FIG. 27 is a table illustrating characteristics of lenses illustrated inFIG. 25;

FIG. 28 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 25;

FIG. 29 is a configuration diagram of a lens module according to aneighth exemplary embodiment of the present disclosure;

FIG. 30 is curves illustrating aberration characteristics of the lensmodule illustrated in FIG. 29;

FIG. 31 is a table illustrating characteristics of lenses illustrated inFIG. 29; and

FIG. 32 is a table illustrating aspherical surface coefficients of thelens module illustrated in FIG. 29.

DETAILED DESCRIPTION

Hereinafter, embodiments in the present disclosure will be described indetail with reference to the accompanying drawings.

The disclosure may, however, be embodied in many different forms andshould not be construed as being limited to the embodiments set forthherein. Rather, these embodiments are provided so that this disclosurewill be thorough and complete, and will fully convey the scope of thedisclosure to those skilled in the art.

In the drawings, the shapes and dimensions of elements may beexaggerated for clarity, and the same reference numerals will be usedthroughout to designate the same or like elements.

In addition, in embodiments of the present disclosure, a first lensrefers to a lens closest to an object (or a subject), and a sixth lensrefers to a lens closest to an image-sensing surface (or an imagesensor). Further, the term ‘first lens surface’ or ‘first surface’refers to a lens surface oriented to or facing the object (or thesubject) in the lens module, and the term ‘second lens surface’ or‘second surface’ refers to a lens surface oriented to or facing theimage-sensing surface (or the image sensor) in the lens module. Inaddition, unless otherwise indicated herein, in embodiments of thepresent disclosure, units of radii of curvature, thicknesses, OALs(optical axis distances from a first surface of the first lens to theimage-sensing surface), SLs, IMGHs (image heights), and BFLs (back focuslengths) of the lenses, an overall focal length of an optical system,and a focal length of each lens may be in millimeters (mm). In addition,unless otherwise indicated herein, thicknesses of lenses, gaps betweenthe lenses, OALs, and SLs may be distances measured based on an opticalaxis of the lenses. Further, in descriptions of lens shapes, unlessotherwise indicated herein, the meaning that one lens surface is convexis that an optical axis portion of a corresponding surface is convex,and the meaning that one lens surface is concave is that an optical axisportion of a corresponding surface is concave. Therefore, although it isdescribed that one lens surface is convex, an edge portion of the lensor a peripheral lens portion of the optical axis may be concave.Likewise, although it is described that one lens surface is concave, anedge portion of the lens or a peripheral lens portion of the opticalaxis may be convex.

A lens module may include an optical system including a plurality oflenses. For example, the optical system of the lens module may includesix or more lenses having refractive power. However, the lens module isnot limited to six lenses. The lens module may further include othercomponents or additional one or more lenses. For example, the lensmodule may include a stop for controlling an amount of light. Inaddition, the lens module may further include an infrared cut-off filterfor removing infrared light. Additionally, the lens module may furtherinclude an image sensor (for example, an imaging device) converting animage of a subject incident through the optical system into anelectrical signal. Further, the lens module may further include a gapmaintaining member adjusting gaps between lenses. In addition to sixlenses, one or more lenses may be arranged in front of the first lens,behind the sixth lens, or between the first and sixth lenses.

First to sixth lenses may be formed of materials having a refractiveindex different from that of air. For example, the first to sixth lensesmay be formed using a plastic material or glass. At least one or more ofthe first to sixth lenses may have an aspherical surface. For example,only the sixth lens of the first to sixth lenses may have the asphericalsurface. As another example, respective at least one or both surfaces ofall of the first to sixth lenses may be aspherical. Here, the asphericalsurface of each lens may be represented by Mathematical Expression 1.

$\begin{matrix}{Z = {\frac{{cr}^{2}}{1 + \sqrt{1 - {\left( {1 + k} \right)c^{2}r^{2}}}} + {Ar}^{4} + {Br}^{6} + {Cr}^{8} + {Dr}^{10} + {Er}^{12} + {Fr}^{14} + {Gr}^{16} + {Hr}^{18} + {Jr}^{20}}} & \left\lbrack {{Mathematical}\mspace{14mu}{Expression}\mspace{14mu} 1} \right\rbrack\end{matrix}$

Here, c is an inverse number of a radius of curvature of a correspondinglens, K is a conic constant, and r is a distance from any point on anaspherical surface to an optical axis. In addition, constants A to Jrefer to sequential 4-th order to 20-th order aspherical coefficients.In addition, Z indicates sag at any point on an aspherical surfacepositioned to be spaced apart from the optical axis by a distance r.

The optical system configuring the lens module may have an F No. of 2.3or less. In this case, the subject may be clearly imaged. For example,the lens module according to the exemplary embodiment of the presentdisclosure may clearly capture an image of the subject even underconditions of low illumination (for example, 100 lux or less). However,F No. of the optical system may be greater than 2.3.

The optical system of the lens module may satisfy the followingConditional Expression.0.5<f1/f<0.9  [Conditional Expression]

Here, f is an overall focal length [mm] of the lens module, and f1 is afocal length [mm] of the first lens. The Conditional Expression above isa numerical condition for optimizing refractive power of the first lens.For example, the first lens that is outside of the lower value limit mayhave relatively strong refractive power to limit optical designs of thesecond to fifth lenses, and the first lens that is outside of the uppervalue limit may have relatively weak refractive power, which may bedisadvantageous in miniaturizing the lens module.

In addition, f1/f may be outside of the lower value limit of theConditional Expression above, but refractive power of the first lens maybe increased, such that it may be difficult to correct sphericalaberration. f1/f may be outside of the upper value limit of theConditional Expression above, but correction of aberration may be easilyperformed and a length of the optical system may be increased.

The optical system of the lens module may satisfy the followingConditional Expressions.20<V1−V2<45  [Conditional Expression]|V1−V3|<15  [Conditional Expression]25<V1−V5<45  [Conditional Expression]

Here, V1 is an Abbe number of the first lens, V2 is an Abbe number ofthe second lens, V3 is an Abbe number of the third lens, and V5 is anAbbe number of the fifth lens.

The Conditional Expressions above may be limitations of lens materialsfor reducing aberration. For example, the first lens may be formed of amaterial selected among materials having an Abbe number that is largerthan those of the second and fifth lenses and is substantially similarto that of the third lens.

In addition, the Conditional Expressions above may be preferredconditions for significantly decreasing chromatic aberration.

The second to fifth lenses of the optical system configuring the lensmodule may satisfy the following Conditional Expressions.−5.0<f2/f<0  [Conditional Expression]0<f3/f<6.0  [Conditional Expression]2.0<f4/f  [Conditional Expression]f5/f<−1.0  [Conditional Expression]

Here, f2 is a focal length [mm] of the second lens, f3 is a focal length[mm] of the third lens, f4 is a focal length [mm] of the fourth lens, f5is a focal length [mm] of the fifth lens, and f is the overall focallength [mm] of the lens module.

The Conditional Expressions above may provide refractive power ranges ofthe second to fifth lenses, in which a length of the optical system maybe shortened. In addition, the Conditional Expressions above may beoptimal conditions for correcting aberration.

The optical system of the lens module may satisfy the followingConditional Expression.OAL/f<1.5  [Conditional Expression]

Here, OAL is a distance [mm] from an object-side surface of the firstlens to an image-sensing surface, and f is the overall focal length [mm]of the lens module. The Conditional Expression above may be a preferredcondition for miniaturizing the lens module.

The first to third lenses of the optical system configuring the lensmodule may satisfy the following Conditional Expressions.1.4<f1/f2<5.0  [Conditional Expression]f2/f3<0.8  [Conditional Expression]

Here, f1 is the focal length [mm] of the first lens, and f2 is the focallength [mm] of the second lens, and f3 is the focal length [mm] of thethird lens.

The Conditional Expressions above may be conditions for optimizingoptical designs of the first to third lenses. For example, when thesecond lens is designed in a range in which at least one or all of theConditional Expressions above are satisfied, degrees of freedom of thefirst and third lenses may be increased. For example, the first andthird lenses may be variously modified or implemented. In addition, theConditional Expressions above may be preferred conditions for improvingaberration characteristics and securing optical performance.

The optical system of the lens module may satisfy the followingConditional Expressions.BFL/f<0.5  [Conditional Expression]D3/f<0.1  [Conditional Expression]0<r3/f<10.0  [Conditional Expression]0<r11/f<5.0  [Conditional Expression]

Here, BFL is a distance [mm] from an image-side surface of the sixthlens to the image-sensing surface, D3 is an optical axis distance froman image-side surface of the first lens to an object-side surface of thesecond lens, r3 is a radius [mm] of curvature of the image-side surfaceof the first lens, r11 is a radius [mm] of curvature of an image-sidesurface of the fifth lens, and f is the overall focal length [mm] of thelens module.

The Conditional Expressions above may be conditions for optimizing sizesof BFL, D3, r3, and r11 having an influence on the overall focal lengthof the optical system. For example, the Conditional Expression for BFLabove may be a preferred condition for miniaturizing the lens module. Asanother example, the Conditional Expression for D3 above may be apreferred condition for improving longitudinal chromatic aberrationcharacteristics. As yet another example, the Conditional Expressions forr3 above and r11 may be preferred conditions for securing refractivepower of the first and fifth lenses.

The optical system of the lens module may satisfy the followingConditional Expression.1.0<EPD/2/f12  [Conditional Expression]

Here, EPD is an entrance pupil diameter (EPD) [mm], and f12 is asynthetic focal length [mm] of the first and second lenses. TheConditional Expression above may be a preferred condition for securingan amount of light. However, EPD/2 may be outside of a range of theConditional Expression above, but a sufficient amount of light may notbe secured, such that it may be difficult to implement relatively highresolution.

Next, the optical system configuring the lens module will hereinafter bedescribed.

The optical system of the lens module may be manufactured in thefollowing manner.

For example, the optical system of the lens module may include a firstlens having refractive power, a second lens having refractive power, athird lens having refractive power, a fourth lens having refractivepower, a fifth lens having refractive power, an object-side surfacethereof being concave and an image-side surface thereof being concave,and a sixth lens having refractive power and having an image-sidesurface thereof being concave.

As another example, the optical system of the lens module may include afirst lens having positive refractive power, a second lens havingrefractive power and an object-side surface thereof being convex, athird lens having positive refractive power, a fourth lens havingpositive refractive power, a fifth lens having refractive power andhaving an image-side surface thereof being concave, and a sixth lenshaving positive refractive power.

As yet another example, the optical system of the lens module mayinclude a first lens having positive refractive power, a second lenshaving refractive power and an object-side surface thereof being convex,a third lens having positive refractive power and an image-side surfacethereof being convex, a fourth lens having positive refractive power, afifth lens having refractive power and an image-side surface thereofbeing concave, and a sixth lens having positive refractive power.

The lenses and an image sensor configuring the optical system willhereinafter be described.

The first lens may have refractive power. For example, the first lensmay have positive refractive power. However, the first lens may havenegative refractive power.

The first lens may be convex toward an object. For example, the firstlens may have a first surface (object-side surface) that is convex and asecond surface (image-side surface) that is concave. However, the firstlens may be concave toward the object.

The first lens may have at least one aspherical surface. For example,both surfaces of the first lens may be aspherical. The first lens may beformed of a material having relatively high light transmissivity and/orexcellent workability. For example, the first lens may be formed using aplastic material. However, a material of the first lens is not limitedto plastic. For example, the first lens may be formed using glass.

The second lens may have refractive power. For example, the second lensmay have negative refractive power. However, the second lens may havepositive refractive power.

The second lens may be convex toward the object. For example, the secondlens may have a first surface that is convex and a second surface thatis concave. However, the second lens may be concave toward the object.

The second lens may have at least one aspherical surface. For example,both surfaces of the second lens may be aspherical. The second lens maybe formed of a material having relatively high light transmissivityand/or excellent workability. For example, the second lens may be formedusing a plastic material. However, a material of the second lens is notlimited to plastic. For example, the second lens may be formed usingglass. The second lens may be formed of a material having a highrefractive index. For example, the second lens may be formed of amaterial having a refractive index of 1.60 or more (in this case, thesecond lens may have an Abbe number of 30 or less). The second lensformed of this material may easily refract light, even in a smallcurvature shape. Therefore, the second lens formed of this material maybe easily manufactured and may lower a defect rate with regard tomanufacturing tolerance. In addition, the second lens formed of thismaterial may allow a distance between lenses to be decreased, such thatthe lens module may be miniaturized.

The third lens may have refractive power. For example, the third lensmay have positive refractive power. However, the third lens may havenegative refractive power.

The third lens may have biconvex surfaces or both surfaces that areconvex. For example, the third lens may have a first surface that isconvex and a second surface that is convex. However, the third lens mayhave at least one concave surface.

The third lens may have at least one aspherical surface. For example,both surfaces of the third lens may be aspherical. The third lens may beformed of a material having relatively high light transmissivity and/orexcellent workability. For example, the third lens may be formed using aplastic material. However, a material of the third lens is not limitedto plastic. For example, the third lens may be formed using glass.

The fourth lens may have refractive power. For example, the fourth lensmay have positive refractive power. However, the fourth lens may havenegative refractive power.

The fourth lens may have a meniscus shape which is convex toward theimage. For example, the fourth lens may have a first surface that isconcave and a second surface that is convex.

The fourth lens may have at least one aspherical surface. For example,both surfaces of the fourth lens may be aspherical. The fourth lens maybe formed of a material having high light transmissivity and/orexcellent workability. For example, the fourth lens may be formed usinga plastic material. However, a material of the fourth lens is notlimited to plastic. For example, the fourth lens may be formed usingglass.

The fifth lens may have refractive power. For example, the fifth lensmay have negative refractive power. However, the fifth lens may havepositive refractive power.

The fifth lens may have one or more surfaces that are concave. Forexample, the fifth lens may have a concave image-side surface. Asanother example, the fifth lens may have both surfaces that are concave.

The fifth lens may have at least one aspherical surface. For example,both surfaces of the fifth lens may be aspherical. The fifth lens may beformed of a material having relatively high light transmissivity and/orexcellent workability. For example, the fifth lens may be formed using aplastic material. However, a material of the fifth lens is not limitedto plastic. For example, the fifth lens may be formed using glass.

In addition, the fifth lens may be formed of a material having arelatively high refractive index. For example, the fifth lens may beformed of a material having a refractive index of 1.60 or more (in thiscase, the fifth lens may have an Abbe number of 30 or less). The fifthlens formed of this material may easily refract light even in arelatively small curvature shape. Therefore, the fifth lens formed ofthis material may be easily manufactured and may lower a defect ratewith regard to manufacturing tolerance. In addition, the fifth lensformed of this material may allow a distance between lenses to bedecreased, such that the lens module may be miniaturized.

The fifth lens may satisfy the following Conditional Expression. Thefifth lens satisfying the following Conditional Expression may be easilymanufactured.0.4<(r10−r11)/(r10+r11)<2.0  [Conditional Expression]

Here, r10 is a radius of curvature of an object-side surface of thefifth lens, and r11 is a radius of curvature of an image-side surface ofthe fifth lens.

The sixth lens may have refractive power. For example, the sixth lensmay have positive refractive power. However, the sixth lens may havenegative refractive power.

The sixth lens may have a meniscus shape which is convex toward theobject. For example, the sixth lens may have a first surface that isconvex and a second surface that is concave.

The sixth lens may have at least one aspherical surface. For example,both surfaces of the sixth lens may be aspherical. In addition, thesixth lens may be formed to include at least one or more inflectionpoints on one or both surfaces thereof. For example, the first surfaceof the sixth lens may be convex on an optical axis, and be concave inthe vicinity of the optical axis. Additionally, the first surface of thesixth lens may be convex at an edge thereof. The second surface of thesixth lens may be concave on an optical axis and become convex toward anedge thereof. The second surface of the sixth lens may be convex towardthe image at the periphery. The sixth lens may be formed of a materialhaving relatively high light transmissivity and/or excellentworkability. For example, the sixth lens may be formed using a plasticmaterial. However, a material of the sixth lens is not limited toplastic. For example, the sixth lens may be formed using glass.

The image sensor may be configured to implement high resolution of, forexample, but not limited to, 1300 or more megapixels. For example, aunit size of the pixels configuring the image sensor may be 1.12 μm orless.

The optical system of the lens module may be configured so thateffective diameters of the lenses become smaller from the first lenstoward the second lens and/or be increased from the third lens towardthe sixth lens. The optical system configured as described above mayincrease an amount of light incident to the image sensor to increaseresolution of the lens module.

The optical system of the lens module may be configured to have a low FNo. For example, the optical system of the lens module may have F No. of2.3 or less. The optical system of the lens module may be configured tohave a relatively short length (OAL). For example, OAL of the lensmodule may be 5.3 [mm] or less.

The lens module configured as described above may reduce aberrationcausing image quality deterioration. In addition, the lens module ofembodiments of the present disclosure may implement relatively highresolution. Further, the lens module configured as described above maybe easily lightened and may reduce manufacturing costs.

A lens module according to a first exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 1.

A lens module 100 may include an optical system including a first lens110, a second lens 120, a third lens 130, a fourth lens 140, a fifthlens 150, and a sixth lens 160. In addition, the lens module 100 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 100 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 110. However, the stop ST may be disposed anywherebetween the first lens 110 and the sixth lens 160.

In the exemplary embodiment of the present disclosure, the first lens110 may have positive refractive power. However, the first lens 110 mayhave negative refractive power. An object-side surface of the first lens110 may be convex and/or an image-side surface of the first lens 110 maybe concave. The second lens 120 may have negative refractive power.However, the second lens 120 may have positive refractive power. Anobject-side surface of the second lens 120 may be convex and/or animage-side surface of the second lens 120 may be concave. The third lens130 may have positive refractive power. However, the third lens 130 mayhave negative refractive power. An object-side surface of the third lens130 may be convex and/or an image-side surface of the third lens 130 maybe convex. The fourth lens 140 may have positive refractive power.However, the fourth lens 140 may have negative refractive power. Anobject-side surface of the fourth lens 140 may be concave and/or animage-side surface of the fourth lens 140 may be convex. The fifth lens150 may have negative refractive power. However, the fifth lens 150 mayhave positive refractive power. The fifth lens 150 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 160 may have positive refractive power. However,the sixth lens 160 may have negative refractive power. An object-sidesurface of the sixth lens 160 may be convex and/or an image-side surfaceof the sixth lens 160 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 160.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 110, the third lens 130, the fourth lens 140, andthe sixth lens 160 may have positive refractive power. Among theselenses, the first lens 110 may have the strongest refractive power, andthe sixth lens 160 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 120 and the fifth lens 150 may have negative refractivepower. Here, the fifth lens 150 may have refractive power stronger thanthat of the second lens 120.

FIG. 2 is a graph illustrating aberration characteristics of the lensmodule 100 of the first exemplary embodiment.

Characteristics of the optical system configuring the lens module 100will hereinafter be described with reference to FIG. 3.

In FIG. 3, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 110, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 120, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 130 to 160, respectively. In addition,Surface Nos. 15 and 16 indicate first and second surfaces of theinfrared cut-off filter 70, respectively.

Aspherical values of the optical system configuring the lens module 100of the first exemplary embodiment will hereinafter be described withreference to FIG. 4.

In FIG. 4, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 110 to 160, and a vertical axis of the tablerefers to characteristics corresponding to each surface of the lenses.

A lens module according to a second exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 5.

A lens module 200 may include an optical system including a first lens210, a second lens 220, a third lens 230, a fourth lens 240, a fifthlens 250, and a sixth lens 260. In addition, the lens module 200 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 200 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 210. However, the stop ST may be disposed anywherebetween the first lens 210 and the sixth lens 260.

In the exemplary embodiment of the present disclosure, the first lens210 may have positive refractive power. However, the first lens 210 mayhave negative refractive power. An object-side surface of the first lens210 may be convex and/or an image-side surface of the first lens 210 maybe concave. The second lens 220 may have negative refractive power.However, the second lens 220 may have positive refractive power. Anobject-side surface of the second lens 220 may be convex and/or animage-side surface of the second lens 220 may be concave. The third lens230 may have positive refractive power. However, the third lens 230 mayhave negative refractive power. An object-side surface of the third lens230 may be convex and/or an image-side surface of the third lens 230 maybe convex. The fourth lens 240 may have positive refractive power.However, the fourth lens 240 may have negative refractive power. Anobject-side surface of the fourth lens 240 may be concave and/or animage-side surface of the fourth lens 240 may be convex. The fifth lens250 may have negative refractive power. However, the fifth lens 250 mayhave positive refractive power. The fifth lens 250 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 260 may have positive refractive power. However,the sixth lens 260 may have negative refractive power. An object-sidesurface of the sixth lens 260 may be convex and/or an image-side surfaceof the sixth lens 260 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 260.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 210, the third lens 230, the fourth lens 240, andthe sixth lens 260 may have positive refractive power. Among theselenses, the first lens 210 may have the strongest refractive power, andthe sixth lens 260 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 220 and the fifth lens 250 may have negative refractivepower. Here, the fifth lens 250 may have refractive power stronger thanthat of the second lens 220.

FIG. 6 is a graph illustrating aberration characteristics of the lensmodule 200 of the second exemplary embodiment.

Characteristics of the optical system configuring the lens module 200will hereinafter be described with reference to FIG. 7.

In FIG. 7, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 210, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 220, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 230 to 260, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 200of the second exemplary embodiment will hereinafter be described withreference to FIG. 8.

In FIG. 8, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 210 to 260, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to a third exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 9.

A lens module 300 may include an optical system including a first lens310, a second lens 320, a third lens 330, a fourth lens 340, a fifthlens 350, and a sixth lens 360. In addition, the lens module 300 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 300 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 310. However, the stop ST may be disposed anywherebetween the first lens 310 and the sixth lens 360.

In the exemplary embodiment of the present disclosure, the first lens310 may have positive refractive power. However, the first lens 310 mayhave negative refractive power. An object-side surface of the first lens310 may be convex and/or an image-side surface of the first lens 310 maybe concave. The second lens 320 may have negative refractive power.However, the second lens 320 may have positive refractive power. Anobject-side surface of the second lens 320 may be convex and/or animage-side surface of the second lens 320 may be concave. The third lens330 may have positive refractive power. However, the third lens 330 mayhave negative refractive power. An object-side surface of the third lens330 may be convex and/or an image-side surface of the third lens 330 maybe convex. The fourth lens 340 may have positive refractive power.However, the fourth lens 340 may have negative refractive power. Anobject-side surface of the fourth lens 340 may be concave and/or animage-side surface of the fourth lens 340 may be convex. The fifth lens350 may have negative refractive power. However, the fifth lens 350 mayhave positive refractive power. The fifth lens 350 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 360 may have positive refractive power. However,the sixth lens 360 may have negative refractive power. An object-sidesurface of the sixth lens 360 may be convex and/or an image-side surfaceof the sixth lens 360 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 360.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 310, the third lens 330, the fourth lens 340, andthe sixth lens 360 may have positive refractive power. Among theselenses, the first lens 310 may have the strongest refractive power, andthe sixth lens 360 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 320 and the fifth lens 350 may have negative refractivepower. Here, the fifth lens 350 may have refractive power stronger thanthat of the second lens 320.

FIG. 10 is a graph illustrating aberration characteristics of the lensmodule 300 of the third exemplary embodiment.

Characteristics of the optical system configuring the lens module 300will hereinafter be described with reference to FIG. 11.

In FIG. 11, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 310, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 320, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 330 to 360, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 300of the third exemplary embodiment will hereinafter be described withreference to FIG. 12.

In FIG. 12, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 310 to 360, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to a fourth exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 13.

A lens module 400 may include an optical system including a first lens410, a second lens 420, a third lens 430, a fourth lens 440, a fifthlens 450, and a sixth lens 460. In addition, the lens module 400 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 400 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 410. However, the stop ST may be disposed anywherebetween the first lens 410 and the sixth lens 460.

In the exemplary embodiment of the present disclosure, the first lens410 may have positive refractive power. However, the first lens 410 mayhave negative refractive power. An object-side surface of the first lens410 may be convex and/or an image-side surface of the first lens 410 maybe concave. The second lens 420 may have negative refractive power.However, the second lens 420 may have positive refractive power. Anobject-side surface of the second lens 420 may be convex and/or animage-side surface of the second lens 420 may be concave. The third lens430 may have positive refractive power. However, the third lens 430 mayhave negative refractive power. An object-side surface of the third lens430 may be convex and/or an image-side surface of the third lens 430 maybe convex. The fourth lens 440 may have positive refractive power.However, the fourth lens 440 may have negative refractive power. Anobject-side surface of the fourth lens 440 may be concave and/or animage-side surface of the fourth lens 440 may be convex. The fifth lens450 may have negative refractive power. However, the fifth lens 450 mayhave positive refractive power. The fifth lens 450 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 460 may have positive refractive power. However,the sixth lens 460 may have negative refractive power. An object-sidesurface of the sixth lens 460 may be convex and/or an image-side surfaceof the sixth lens 460 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 460.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 410, the third lens 430, the fourth lens 440, andthe sixth lens 460 may have positive refractive power. Among theselenses, the first lens 410 may have the strongest refractive power, andthe sixth lens 460 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 420 and the fifth lens 450 may have negative refractivepower. Here, the fifth lens 450 may have refractive power stronger thanthat of the second lens 420.

FIG. 14 is a graph illustrating aberration characteristics of the lensmodule 400 of the fourth exemplary embodiment.

Characteristics of the optical system configuring the lens module 400will hereinafter be described with reference to FIG. 15.

In FIG. 15, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 410, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 420, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 430 to 460, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 400of the fourth exemplary embodiment will hereinafter be described withreference to FIG. 16.

In FIG. 16, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 410 to 460, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to a fifth exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 17.

A lens module 500 may include an optical system including a first lens510, a second lens 520, a third lens 530, a fourth lens 540, a fifthlens 550, and a sixth lens 560. In addition, the lens module 500 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 500 may further include a stop (ST). Forexample, the stop ST may be disposed between a subject (object) and thefirst lens 510. However, the stop ST may be disposed anywhere betweenthe first lens 510 and the sixth lens 560.

In the exemplary embodiment of the present disclosure, the first lens510 may have positive refractive power. However, the first lens 510 mayhave negative refractive power. An object-side surface of the first lens510 may be convex and/or an image-side surface of the first lens 510 maybe concave. The second lens 520 may have negative refractive power.However, the second lens 520 may have positive refractive power. Anobject-side surface of the second lens 520 may be convex and/or animage-side surface of the second lens 520 may be concave. The third lens530 may have positive refractive power. However, the third lens 530 mayhave negative refractive power. An object-side surface of the third lens530 may be convex and/or an image-side surface of the third lens 530 maybe convex. The fourth lens 540 may have positive refractive power.However, the fourth lens 540 may have negative refractive power. Anobject-side surface of the fourth lens 540 may be concave and/or animage-side surface of the fourth lens 540 may be convex. The fifth lens550 may have negative refractive power. However, the fifth lens 550 mayhave positive refractive power. The fifth lens 550 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 560 may have positive refractive power. However,the sixth lens 560 may have negative refractive power. An object-sidesurface of the sixth lens 560 may be convex and/or an image-side surfaceof the sixth lens 560 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 560.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 510, the third lens 530, the fourth lens 540, andthe sixth lens 560 may have positive refractive power. Among theselenses, the first lens 510 may have the strongest refractive power, andthe sixth lens 560 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 520 and the fifth lens 550 may have negative refractivepower. Here, the second lens 520 may have refractive power stronger thanthat of the fifth lens 550.

FIG. 18 is a graph illustrating aberration characteristics of the lensmodule 500 of the fifth exemplary embodiment.

Characteristics of the optical system configuring the lens module 500will hereinafter be described with reference to FIG. 19.

In FIG. 19, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 510, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 520, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 530 to 560, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 500of the fifth exemplary embodiment will hereinafter be described withreference to FIG. 20.

In FIG. 20, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 510 to 560, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to a sixth exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 21.

A lens module 600 may include an optical system including a first lens610, a second lens 620, a third lens 630, a fourth lens 640, a fifthlens 650, and a sixth lens 660. In addition, the lens module 600 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 600 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 610. However, the stop ST may be disposed anywherebetween the first lens 610 and the sixth lens 660.

In the exemplary embodiment of the present disclosure, the first lens610 may have positive refractive power. However, the first lens 610 mayhave negative refractive power. An object-side surface of the first lens610 may be convex and/or an image-side surface of the first lens 610 maybe concave. The second lens 620 may have negative refractive power.However, the second lens 620 may have positive refractive power. Anobject-side surface of the second lens 620 may be convex and/or animage-side surface of the second lens 620 may be concave. The third lens630 may have positive refractive power. However, the third lens 630 mayhave negative refractive power. An object-side surface of the third lens630 may be convex and/or an image-side surface of the third lens 630 maybe convex. The fourth lens 640 may have positive refractive power.However, the fourth lens 640 may have negative refractive power. Anobject-side surface of the fourth lens 640 may be concave and/or animage-side surface of the fourth lens 640 may be convex. The fifth lens650 may have negative refractive power. However, the fifth lens 650 mayhave positive refractive power. The fifth lens 650 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 660 may have positive refractive power. However,the sixth lens 660 may have negative refractive power. An object-sidesurface of the sixth lens 660 may be convex and/or an image-side surfaceof the sixth lens 660 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 660.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 610, the third lens 630, the fourth lens 640, andthe sixth lens 660 may have positive refractive power. Among theselenses, the first lens 610 may have the strongest refractive power, andthe sixth lens 660 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 620 and the fifth lens 650 may have negative refractivepower. Here, the second lens 620 may have refractive power stronger thanthat of the fifth lens 650.

FIG. 22 is a graph illustrating aberration characteristics of the lensmodule 600 of the sixth exemplary embodiment.

Characteristics of the optical system configuring the lens module 600will hereinafter be described with reference to FIG. 23.

In FIG. 23, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 610, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 620, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 630 to 660, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 600of the sixth exemplary embodiment will hereinafter be described withreference to FIG. 24.

In FIG. 24, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 610 to 660, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to a seventh exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 25.

A lens module 700 may include an optical system including a first lens710, a second lens 720, a third lens 730, a fourth lens 740, a fifthlens 750, and a sixth lens 760. In addition, the lens module 700 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 700 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 710. However, the stop ST may be disposed anywherebetween the first lens 710 and the sixth lens 760.

In the exemplary embodiment of the present disclosure, the first lens710 may have positive refractive power. However, the first lens 710 mayhave negative refractive power. An object-side surface of the first lens710 may be convex and/or an image-side surface of the first lens 710 maybe concave. The second lens 720 may have negative refractive power.However, the second lens 720 may have positive refractive power. Anobject-side surface of the second lens 720 may be convex and/or animage-side surface of the second lens 720 may be concave. The third lens730 may have positive refractive power. However, the third lens 730 mayhave negative refractive power. An object-side surface of the third lens730 may be convex and/or an image-side surface of the third lens 730 maybe convex. The fourth lens 740 may have positive refractive power.However, the fourth lens 740 may have negative refractive power. Anobject-side surface of the fourth lens 740 may be concave and/or animage-side surface of the fourth lens 740 may be convex. The fifth lens750 may have negative refractive power. However, the fifth lens 750 mayhave positive refractive power. An object-side surface of the fifth lens750 may be convex and/or an image-side surface of the fifth lens 750 maybe concave. The sixth lens 760 may have positive refractive power.However, the sixth lens 760 may have negative refractive power. Anobject-side surface of the sixth lens 760 may be convex and/or animage-side surface of the sixth lens 760 may be concave. In addition,one or more inflection points may be formed on at least one or each ofthe object-side surface and the image-side surface of the sixth lens760.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 710, the third lens 730, the fourth lens 740, andthe sixth lens 760 may have positive refractive power. Among theselenses, the first lens 710 may have the strongest refractive power, andthe sixth lens 760 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 720 and the fifth lens 750 may have negative refractivepower. Here, the fifth lens 750 may have refractive power stronger thanthat of the second lens 720.

FIG. 26 is a graph illustrating aberration characteristics of the lensmodule 700 of the seventh exemplary embodiment.

Characteristics of the optical system configuring the lens module 700will hereinafter be described with reference to FIG. 27.

In FIG. 27, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 710, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 720, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 730 to 760, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 700of the seventh exemplary embodiment will hereinafter be described withreference to FIG. 28.

In FIG. 28, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 710 to 760, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

A lens module according to an eighth exemplary embodiment of the presentdisclosure will hereinafter be described with reference to FIG. 29.

A lens module 800 may include an optical system including a first lens810, a second lens 820, a third lens 830, a fourth lens 840, a fifthlens 850, and a sixth lens 860. In addition, the lens module 800 mayfurther include an infrared cut-off filter 70 and an image sensor 80.Further, the lens module 800 may further include at least one stop (ST).For example, the stop ST may be disposed between a subject (object) andthe first lens 810. However, the stop ST may be disposed anywherebetween the first lens 810 and the sixth lens 860.

In the exemplary embodiment of the present disclosure, the first lens810 may have positive refractive power. However, the first lens 810 mayhave negative refractive power. An object-side surface of the first lens810 may be convex and/or an image-side surface of the first lens 810 maybe concave. The second lens 820 may have negative refractive power.However, the second lens 820 may have positive refractive power. Anobject-side surface of the second lens 820 may be convex and/or animage-side surface of the second lens 820 may be concave. The third lens830 may have positive refractive power. However, the third lens 830 mayhave negative refractive power. An object-side surface of the third lens830 may be convex and/or an image-side surface of the third lens 830 maybe convex. The fourth lens 840 may have positive refractive power.However, the fourth lens 840 may have negative refractive power. Anobject-side surface of the fourth lens 840 may be concave and/or animage-side surface of the fourth lens 840 may be convex. The fifth lens850 may have negative refractive power. However, the fifth lens 850 mayhave positive refractive power. The fifth lens 850 may have anobject-side surface that is concave and/or an image-side surface that isconcave. The sixth lens 860 may have positive refractive power. However,the sixth lens 860 may have negative refractive power. An object-sidesurface of the sixth lens 860 may be convex and/or an image-side surfaceof the sixth lens 860 may be concave. In addition, one or moreinflection points may be formed on at least one or each of theobject-side surface and the image-side surface of the sixth lens 860.

In the exemplary embodiment of the present disclosure, at least one orall of the first lens 810, the third lens 830, the fourth lens 840, andthe sixth lens 860 may have positive refractive power. Among theselenses, the first lens 810 may have the strongest refractive power, andthe sixth lens 860 may have the weakest refractive power.

In the exemplary embodiment of the present disclosure, one or both ofthe second lens 820 and the fifth lens 850 may have negative refractivepower. Here, the second lens 820 may have refractive power stronger thanthat of the fifth lens 850.

FIG. 30 is a graph illustrating aberration characteristics of the lensmodule 800 of the eighth exemplary embodiment.

Characteristics of the optical system configuring the lens module 800will hereinafter be described with reference to FIG. 31.

In FIG. 31, Surface Nos. 2 and 3 indicate the first and second surfacesof the first lens 810, respectively, and Surface Nos. 4 and 5 indicatethe first and second surfaces of the second lens 820, respectively. In asimilar scheme, Surface Nos. 7 to 14 indicate first and second surfacesof the third to sixth lenses 830 to 860, respectively. Meanwhile,Surface No. 6 indicates the stop ST, and Surface Nos. 15 and 16 indicatefirst and second surfaces of the infrared cut-off filter 70,respectively.

Aspherical values of the optical system configuring the lens module 800of the eighth exemplary embodiment will hereinafter be described withreference to FIG. 32.

In FIG. 32, a horizontal axis of the table refers to Surface Nos. of thefirst to sixth lenses 810 to 860, and a vertical axis of the tablerefers to characteristics corresponding to each lens surface.

Table 1 (shown below) shows optical characteristics of the lens modulesaccording to the first to eighth exemplary embodiments in the presentdisclosure. The lens module may substantially have an overall focallength (f) of 3.70 to 4.60. In the lens module, a focal length (f1) ofthe first lens may be substantially within a range of 3.0 to 4.0. In thelens module, a focal length (f2) of the second lens may be substantiallywithin a range of −10.0 to −5.0. In the lens module, a focal length (f3)of the third lens may be substantially within a range of 11.0 to 19.0.In the lens module, a focal length (f4) of the fourth lens may besubstantially within a range of 19.0 to 24.0. In the lens module, afocal length (f5) of the fifth lens may be substantially within a rangeof −12.0 to −6.0. In the lens module, a focal length (f6) of the sixthlens may be substantially 90.0 or more. In the lens module, a syntheticfocal length (f12) of the first and second lenses may be substantiallywithin a range of 3.9 to 5.9. In the lens module, a radius (EPD/2) of anentrance pupil having an entrance pupil diameter (EPD) may besubstantially within a range of 0.85 to 1.15. In the lens module, anoverall length of the optical system may be substantially within a rangeof 4.3 to 5.4. In the lens module, BFL may be substantially within arange of 0.90 to 1.05. In the lens module, a field of view (FOV) of thelens module may be substantially in a range of 72.0 to 84.0. Inaddition, F No. of the lens module may be substantially in a range of1.90 to 2.10.

TABLE 1 First Second Third Fourth Fifth Sixth Seventh Eighth ExemplaryExemplary Exemplary Exemplary Exemplary Exemplary Exemplary ExemplaryEmbodiment Embodiment Embodiment Embodiment Embodiment EmbodimentEmbodiment Embodiment f 3.735 3.735 3.735 3.735 3.730 3.730 3.730 4.450f1 3.003 3.036 3.012 3.021 3.264 3.263 3.038 3.851 f2 −5.536 −5.703−5.538 −5.581 −8.566 −8.572 −5.421 −9.795 f3 12.741 12.452 13.088 12.78012.030 12.023 11.879 17.961 f4 21.922 20.419 20.197 19.996 22.478 19.76122.279 20.699 f5 −10.640 −9.557 −10.772 −10.136 −7.038 −6.587 −11.062−8.577 f6 491.36 91.13 5199.46 184.99 108.91 98.26 99.46 2605.30 f125.086 5.080 5.122 5.132 4.458 4.454 5.290 5.382 EPD/2 0.900 0.900 0.9000.900 0.900 0.900 0.900 1.070 OAL 4.684 4.687 4.692 4.687 4.449 4.4354.701 5.261 BFL 1.023 1.034 1.024 1.036 0.991 0.983 1.044 1.008 FOV74.90 75.10 75.00 75.00 75.00 75.00 75.00 81.10 F No. 2.070 2.070 2.0802.070 2.070 2.070 1.990 2.080

Table 2 (shown below) shows numerical ranges of Conditional Expressionsand values of Conditional Expressions of the lens modules according tothe first to eighth exemplary embodiments in the present disclosure.

TABLE 2 First Second Third Fourth Fifth Sixth Seventh Eight ConditionalExemplary Exemplary Exemplary Exemplary Exemplary Exemplary ExemplaryExemplary Expression Embodiment Embodiment Embodiment EmbodimentEmbodiment Embodiment Embodiment Embodiment 1 0.5 < f1/f < 0.9 0.8040.823 0.806 0.809 0.875 0.875 0.814 0.865 2 20 < V1 − V2 < 45 34.6 34.634.6 34.6 34.6 34.6 34.6 32.8 3 |v1 − v3| <15 0.0 0.0 0.0 0.0 0.0 0.00.0 0.0 4 25 < v1 − v5 < 45 34.6 34.6 34.6 34.6 34.6 34.6 34.6 32.8 5−5.0 < f2/f <0.0 −1.482 −1.527 −1.483 −1.494 −2.296 −2.298 −1.453 −2.2016 0.0 < f3/f < 6.0 3.411 3.334 3.504 3.422 3.225 3.223 3.185 4.036 7 2.0< f4/f 5.869 5.467 5.407 5.354 6.026 5.298 5.973 4.651 8 f5/f < −1.0−2.849 −2.559 −2.884 −2.714 −1.887 −1.766 −2.966 −1.927 9 OAL/f < 1.51.254 1.255 1.256 1.255 1.193 1.189 1.260 1.182 10 −1.0 < f1/f2 < 0.0−0.542 −0.532 −0.544 −0.541 −0.381 −0.381 −0.560 −0.393 11 −1.0 < f2/f3< 0.0 −0.434 −0.458 −0.423 −0.437 −0.712 −0.713 −0.456 −0.545 12 BFL/f <0.5 0.274 0.277 0.274 0.277 0.266 0.263 0.280 0.226 13 D3/f < 0.1 0.0140.014 0.015 0.016 0.026 0.025 0.027 0.025 14 0.0 < r3/f < 10.0 8.2756.319 7.538 7.047 1.248 1.238 9.249 1.175 15 0.0 < r11/f < 5.0 2.0171.798 2.044 2.066 1.435 1.409 1.193 1.674 16 1.0 < EPD/2/f12 1.360 1.3601.370 1.370 1.200 1.190 1.420 1.210

As seen in Table 2, the lens modules according to the first to eighthexemplary embodiments in the present disclosure may satisfy at least oneor all of the Conditional Expressions. Meanwhile, the lens modulesaccording to the first to eighth exemplary embodiments in the presentdisclosure may have values of 1.163, 1.144, 1.165, 1.365, 1.366, 1.532,0.454, and 1.909, respectively, with respect to Conditional Expression:(r10−r11)/(r10+r11) for a shape of the fifth lens.

As set forth above, according to some exemplary embodiments in thepresent disclosure, an optical system having high resolution may beimplemented.

While exemplary embodiments have been shown and described above, it willbe apparent to those skilled in the art that modifications andvariations could be made without departing from the scope of the presentinvention as defined by the appended claims.

What is claimed is:
 1. A lens module comprising: a first lens havingpositive refractive power, a convex object-side surface, and a concaveimage-side surface; a second lens having negative refractive power, aconvex object-side surface, and a concave image-side surface; a thirdlens having a convex object-side surface; a fourth lens having arefractive power; a fifth lens having a concave image-side surface inthe optical axis portion, wherein the optical axis portion excludes aperipheral region; and a sixth lens having positive refractive power inthe optical axis portion, and a concave image-side surface in theoptical axis portion, wherein the first to sixth lenses are sequentiallydisposed from an object side to an image side, and wherein 0<r3/f<10.0where f is an overall focal length of the lens module, and r3 is aradius of curvature of an image-side surface of the first lens.
 2. Thelens module of claim 1, wherein the third lens has a convex object-sidesurface.
 3. The lens module of claim 1, wherein the fourth lens has aconcave object-side surface.
 4. The lens module of claim 1, wherein thefourth lens has a convex image-side surface.
 5. The lens module of claim1, wherein the fifth lens has negative refractive power.
 6. The lensmodule of claim 1, wherein the following Conditional Expression issatisfied:0.5<f1/f<0.9  [Conditional Expression] where f is an overall focallength of the lens module and f1 is a focal length of the first lens. 7.The lens module of claim 1, wherein20<V1−V2<45 where V1 is an Abbe number of the first lens, and V2 is anAbbe number of the second lens.
 8. The lens module of claim 1, wherein|V1−V3|<15 where V1 is an Abbe number of the first lens, and V3 is anAbbe number of the third lens.
 9. The lens module of claim 1, wherein−5.0<f2/f<0 where f is an overall focal length of the lens module, andf2 is a focal length of the second lens.
 10. The lens module of claim 1,wherein0<f3/f<6.0 where f is an overall focal length of the lens module, and f3is a focal length of the third lens.
 11. The lens module of claim 1,whereinOAL/f<1.5 where f is an overall focal length of the lens module, and OALis a distance from an object-side surface of the first lens to animage-sensing surface.
 12. The lens module of claim 1, wherein−1.0<f1/f2<0.0 where f1 is a focal length of the first lens, and f2 is afocal length of the second lens.
 13. The lens module of claim 1, whereinBFL/f<0.5 where f is an overall focal length of the lens module, and BFLis a distance from an image-side surface of the sixth lens to animage-sensing surface.
 14. The lens module of claim 1, whereinD3/f<0.1 where f is an overall focal length of the lens module, and D3is a distance from an image-side surface of the first lens to theobject-side surface of the second lens.
 15. The lens module of claim 1,wherein0<r11/f<5.0 where f is an overall focal length of the lens module, andr11 is a radius of curvature of the concave image-side surface of thefifth lens.